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Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    1. Disconnect the P33 certification ECU (smart key ECU assembly) connector.
      Fig 1: Identifying P33 Certification ECU Connector Terminal
      G05320663Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value(s) in the table below.
      VOLTAGE SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P33-1 (+B1) - Body ground L - Body ground +B power supply Always 11 to 14 V
      P33-17 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, the wire harness side may have a malfunction.

    3. Reconnect the P33 certification ECU (smart key ECU assembly) connector
    4. Measure the voltage according to the value(s) in the table below.
      VOLTAGE SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P33-3 (TSW1) - P33-17 (E) Y - W-B Entry lock switch LH signal Entry lock switch LH not pushed 11 to 14 V
      P33-3 (TSW1) - P33-17 (E) Y - W-B Entry lock switch LH signal Entry lock switch LH pushed Below 2 V
      P33-4 (TSW2) - P33-17 (E) BR - W-B Entry lock switch RH signal Entry lock switch RH not pushed 11 to 14 V
      P33-4 (TSW2) - P33-17 (E) BR - W-B Entry lock switch RH signal Entry lock switch RH pushed Below 2 V
      P33-5 (SEL1) - P33-17 (E) W - W-B Touch sensor activation control signal Move the key more than 5 m (16 4 ft) away from the front door LH 11 to 14 V
      P33-5 (SEL1) - P33-17 (E) W - W-B Touch sensor activation control signal Brought to door outside handle assembly Below 1 V
      P33-6 (SEL2) - P33-17 (E) B - W-B Touch sensor activation control signal Move the key more than 5 m (16 4 ft) away from the front door RH 11 to 14 V
      P33-6 (SEL2) - P33-17 (E) B - W-B Touch sensor activation control signal Brought to door outside handle assembly Below 1 V
      P33-11 (CLG5) - P33-12 (CG5B) Y - V Indoor electrical key oscillator (front floor) sensor signal 30 seconds after driver side door opened and closed, engine switch off Below 1 V
      P33-11 (CLG5) - P33-12 (CG5B) Y - V Indoor electrical key oscillator (front floor) sensor signal Within 30 seconds driver side door opened and closed, engine switch off Alternating between 5 V and below 1 V
      P33-13 (CLG6) - P33-14 (CG6B) LG - O Indoor electrical key oscillator (rear floor) sensor signal 30 seconds after driver side door opened and closed, engine switch off Below 1 V
      P33-13 (CLG6) - P33-14 (CG6B) LG - O Indoor electrical key oscillator (rear floor) sensor signal Within 30 seconds driver side door opened and closed, engine switch off Alternating between 5 V and below 1 V
      P33-15 (CLG7) - P33-16 (CG7B) SB - P Indoor electrical key oscillator (luggage compartment) sensor signal Luggage compartment door opener outer switch OFF Alternating between 5 V and below 1 V
      P33-15 (CLG7) - P33-16 (CG7B) SB - P Indoor electrical key oscillator (luggage compartment) sensor signal Luggage compartment door opener outer switch ON Below 1 V
      P33-18 (IG) - Body ground B - Body ground Ignition power supply Engine switch off Below 1 V
      P33-18 (IG) - Body ground B - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
      P33-19 (ACC) - Body ground O - Body ground ACC power supply Engine switch off Below 1 V
      P33-19 (ACC) - Body ground O - Body ground ACC power supply Engine switch on (ACC) 11 to 14 V
      P33-22 (SEN1) - P33-17 (E) G - W-B Touch sensor detection signal Door outside handle assembly touched Below 2 V
      P33-22 (SEN1) - P33-17 (E) G - W-B Touch sensor detection signal Door outside handle assembly not touched 11 to 14 V
      P33-23 (SEN2) - P33-17 (E) W - W-B Touch sensor detection signal Door outside handle assembly touched Below 2 V
      P33-23 (SEN2) - P33-17 (E) W - W-B Touch sensor detection signal Door outside handle assembly not touched 11 to 14 V
      P33-29 (RCO) - P33-17 (E) LG - W-B Entry door control receiver power source Engine switch off, all doors closed and electrical key switch on 4 5 to 5 5 V
      P33-29 (RCO) - P33-17 (E) LG - W-B Entry door control receiver power source Engine switch off, all doors closed and electrical key switch off Below 1 V
      P33-31 (CLG8) - P33-32 (CG8B) B - W Outside electrical key oscillator (luggage compartment) sensor signal Luggage compartment door opener outer switch OFF Below 1 V
      P33-31 (CLG8) - P33-32 (CG8B) B - W Outside electrical key oscillator (luggage compartment) sensor signal Luggage compartment door opener outer switch ON Alternating between 5 V and below 1 V
      P33-33 (CLG1) - P33-34 (CG1B) R - BR Door electrical key oscillator (driver side) sensor signal All doors closed, all doors locked and engine switch off Alternating between 5 V and below 1 V
      P33-33 (CLG1) - P33-34 (CG1B) R - BR Door electrical key oscillator (driver side) sensor signal Door unlocked or door open Below 1 V
      P33-35 (CLG2) - P33-36 (CG2B) G - P Door electrical key oscillator (front passenger side) sensor signal All doors closed, all doors locked and engine switch off Alternating between 5 V and below 1 V
      P33-35 (CLG2) - P33-36 (CG2B) G - P Door electrical key oscillator (front passenger side) sensor signal Door unlocked or door open Below 1 V
      P33-37 (ASEL) - Body ground SB - Body ground Tuner select signal Engine switch off, luggage compartment door opener outer switch is ON 4 5 to 5 5 V
      P33-37 (ASEL) - Body ground SB - Body ground Tuner select signal Engine switch off, luggage compartment door opener outer switch is OFF Below 1 V
      P33-38 (RDA) - P33-17 (E) R - W-B Entry door control receiver data input signal Engine switch off, all doors closed and electrical key switch off 11 to 14V
      P33-38 (RDA) - P33-17 (E) R - W-B Entry door control receiver data input signal Engine switch off, all doors closed and electrical key switch on Pulse generation
      P33-38 (RDA) - Body ground R - Body ground Tuner input signal Engine switch off, all doors closed, the electrical key is not in the detection area 11 to 14 V
      P33-38 (RDA) - Body ground R - Body ground Tuner input signal The electrical key is in the detection area Pulse generation
      P33-39 (RSSI) - P33-17 (E) Y - W-B Entry door control receiver electric wave existence signal Engine switch off, all doors closed, the electrical key is not in the detection area 11 to 14 V
      P33-39 (RSSI) - P33-17 (E) Y - W-B Entry door control receiver electric wave existence signal Engine switch off, all doors closed, the electrical key is in the detection area Below 1 V

      If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction

  2. CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH) 
    1. Disconnect the RK, RN and RD junction block connectors
      Fig 2: Identifying RK, RN And RD Junction Block Connectors
      G05754216Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value (s) in the table below
      VOLTAGE SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      RK-5 (BECU) - Body ground G-R - Body ground Battery power supply Always 11 to 14 V
      RN-1 (BATB) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      RD-7 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      RD-17 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction in the wire harness side

    3. Reconnect the RK, RN, and RD junction block connectors
    4. Measure the voltage according to the value (s) in the table below
      VOLTAGE SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P1-14 (DCTY) - Body ground W - Body ground Driver side door courtesy switch input Driver side door open Below 1 V
      P1-14 (DCTY) - Body ground W - Body ground Driver side door courtesy switch input Driver side door closed 11 to 14 V
      J75-23 (PCTY) - Body ground B - Body ground Front passenger side door courtesy switch input Front passenger side door open Below 1 V
      J75-23 (PCTY) - Body ground B - Body ground Front passenger side door courtesy switch input Front passenger side door closed 11 to 14 V
      RA-11 (LCTY) - Body ground BR - Body ground Rear door LH courtesy light switch input Rear door LH open Below 1 V
      RA-11 (LCTY) - Body ground BR - Body ground Rear door LH courtesy light switch input Rear LH side door closed 11 to 14 V
      P1-16 (RCTY) - Body ground O - Body ground Rear door RH courtesy light switch input Rear door RH open Below 1 V
      P1-16 (RCTY) - Body ground O - Body ground Rear door RH courtesy light switch input Rear RH side door closed 11 to 14 V
      J75-25 (LGCY) - Body ground L - Body ground Luggage compartment door courtesy light switch input Luggage compartment door open Below 1 V
      J75-25 (LGCY) - Body ground L - Body ground Luggage compartment door courtesy light switch input Luggage compartment door closed 11 to 14 V

      If the result is not as specified, the main body ECU RH (cowl side junction block RH) may have a malfunction

  3. CHECK MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH) 
    1. Disconnect the LH junction block connector
      Fig 3: Identifying LH Junction Block Connector Location
      G05754337Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value (s) in the table below.
      VOLTAGE SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      LD-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      LD-18 (MPXB) - Body ground LG - Body ground Battery power supply Always 11 to 14 V

      If the result is not as specified, there may be a malfunction in the wire harness side

    3. Reconnect the LH junction block connector
    4. Measure the voltage according to the value (s) in the table below
      VOLTAGE SPECIFICATION

      Tester Connection Wiring Color Terminal Description Switch Condition Specified Condition
      Q3-13 (LPSW) - Body ground BR - Body ground Luggage compartment opener outer switch signal Luggage compartment opener outer switch OFF 11 to 14 V
      Q3-13 (LPSW) - Body ground BR - Body ground Luggage compartment opener outer switch signal Luggage compartment opener outer switch ON Below 1 V

      If the result is not as specified, the main body ECU LH (cowl side junction block LH) may have a malfunction

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